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Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not presently so close. Object temporal distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity on 7 April '18

The MPC's NEO Confirmation Page has 13 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had thirteen objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of fifteen listings on the NEOCP today.

Impact Risk Monitoring on 7 April '18

Summary Risk Table for Risk Assessments Updated Today (last checks: NEODyS at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.

0000NNN000

Object

RiskMonitor

WhenNotedUTC

0000T0000YearRange

VI#

000NN00ProbCum

T0000PSCum

T0000PSMax

TS

Notes for Today's Latest Risk Assessments

2018 GG

JPL Sentry

2236

2086-2095

5

1.34837e-05

-4.71

-4.98

0

JPL: Computed at 15:28 today Pacific time based on 73 observations spanning 1.5081 days (2018-Apr-06.30127 to 2018-Apr-07.80936). Diameter approximately 0.042 km. from weighted mean H=24.52.

2018 GC

NEODyS

1733

2098

1

1.55e-09

-6.77

-6.77

0

NEODyS #2 for the day: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2018-04-04.162 to 2018-04-07.176."

2018 FJ5

NEODyS

1733

2084

1

2.73e-07

-3.75

-3.75

0

NEODyS: "Based on 61 optical observations (of which 1 are rejected as outliers) from 2018-03-24.431 to 2018-04-07.148."

JPL Sentry

1600

2084-2084

1

2.726e-08

-4.78

-4.78

0

JPL: Computed at 07:29 today Pacific time based on 64 observations spanning 13.717 days (2018-Mar-24.43016 to 2018-Apr-07.14739). Diameter approximately 0.350 km. from weighted mean H=19.90.

2018 FQ4

NEODyS

1733

R E M O V E D

-

2018 FC2

NEODyS

1733

2092-2099

2

1.09e-08

-8.04

-8.09

0

NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2018-03-18.581 to 2018-04-05.365."

JPL Sentry

1600

2099-2099

1

2.254e-10

-9.73

-9.73

0

JPL: Computed at 07:28 today Pacific time based on 37 observations spanning 17.784 days (2018-Mar-18.58001 to 2018-Apr-05.363839). Diameter approximately 0.038 km. from weighted mean H=24.76.

2018 EL4

NEODyS

1733

2102-2110

3

8.58e-07

-6.58

-6.83

0

NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2018-03-14.211 to 2018-04-05.325."

JPL Sentry

1600

2110-2110

2

2.3077e-07

-7.19

-7.35

0

JPL: Computed at 07:35 today Pacific time based on 77 observations spanning 22.115 days (2018-Mar-14.20994 to 2018-Apr-05.32462). Diameter approximately 0.031 km. from weighted mean H=25.21.

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.